Yeah, but... those are human zombies. And aren't they like 10x stronger because they can't feel pain?

Which reminds me: do Pokemon keep some of their abilities after zombiefication? For example, can, say, a Torkoal still breathe fire? And what about ones like Muk, where their body is literally poisonous (I assume)? Keeping in mind that they're part of the Pokemon's natural bodily functions?